Text: A total of five sets of dipolar couplings are measured, including the one-bond NH, CAHA, C'CA, and NC' couplings, and the two-bond C'HA couplings. Additionally, the sidechain CBHB dipolar ...Text: A total of five sets of dipolar couplings are measured, including the one-bond NH, CAHA, C'CA, and NC' couplings, and the two-bond C'HA couplings. Additionally, the sidechain CBHB dipolar couplings are measured to assign chi-1 rotamers for locked sidechains.
手法: simulated annealing / ソフトェア番号: 1 詳細: This structure is determined mainly by residual dipolar couplings measured in A liquid crystalline Pf1 medium. The structure calculation scheme, described in the paper, is based on the idea ...詳細: This structure is determined mainly by residual dipolar couplings measured in A liquid crystalline Pf1 medium. The structure calculation scheme, described in the paper, is based on the idea of refining existing structural models against dipolar couplings to derive thecorrect structure. Here a total of 323 backbone dipolar couplings are used to refine the backbone structure. Additionally, 38 sidechain dipolar couplings and 85 3-bond J couplings are used to determine the sidechain chi1 and chi2 rotamers as well as the presence of rotameric averaging. A total of three structures (model 1-3) were calculated starting from the 1. A crystal structure of Ca-calmodulin (PDB entry 1EXR), the NMR structure of apo-calmodulin (1F70), and the crystal structure of Ca-ligated parvalbumin (1CDP). The convergence of refinement is indicated by the small average RMSD between the three calculated structures and the average coordinates (0.28 A for backbone and 0.87 for all heavy atoms). During the three-stage simulated annealing described in the paper, restraints are included for most previously established hydrogen bonds, but have only minute effects (< 0.3 A) on the final structure.
代表構造
選択基準: lowest dipolar energy
NMRアンサンブル
コンフォーマー選択の基準: structure with lowest dipolar energy 計算したコンフォーマーの数: 3 / 登録したコンフォーマーの数: 3